. >> 11 finance ministers in luxembourg agreed to pass a controversial tax on financial transactions. >> the nobel prize for physics goes to the scientists from france and the u.s. >> we began in greece where tens of thousands of angry protesters filled the streets of athens on tuesday to greet german chancellor angela merkel. >> it is her first visit there since the eurozone crisis erupted. she reaffirmed their commitment to keep the debt-ridden state inside your's single currency but offered no promise of further aid. >> a new report on the greek reform process is due next month, and in the meantime, greece is negotiating highly unpopular austerity measures. protesters blamed merkel. >> this morning's peaceful protest turned violent in their early afternoon. police used tear gas to disperse demonstrators. some 40,000 people took to the streets of athens to express their anger with the eu, the austerity measures, and the german chancellor. safely away from the protests, angela merkel said she understood the problems facing many greeks. she promised help as athens performs its health